package com.efounder.chat.utils;

import android.content.Context;
import android.content.SharedPreferences;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

public class SPUtils
{  
    /** 
     * 保存在手机里面的文件名 
     */  
    public static final String FILE_NAME = "share_data";
 
    /** 
     * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法 
     *  
     * @param context 
     * @param key 
     * @param object 
     */  
    public static void put(Context context, String key, Object object)
    {  
 
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
 
        if (object instanceof String)
        {  
            editor.putString(key, (String) object);
        } else if (object instanceof Integer)
        {  
            editor.putInt(key, (Integer) object);
        } else if (object instanceof Boolean)
        {  
            editor.putBoolean(key, (Boolean) object);
        } else if (object instanceof Float)
        {  
            editor.putFloat(key, (Float) object);
        } else if (object instanceof Long)
        {  
            editor.putLong(key, (Long) object);
        } else  
        {  
            editor.putString(key, object.toString());  
        }  
 
        SharedPreferencesCompat.apply(editor);  
    }  
    /** 
     * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值 
     *  
     * @param context 
     * @param key 
     * @param defaultObject 
     * @return 
     */  
    public static Object get(Context context, String key, Object defaultObject)
    {  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
 
        if (defaultObject instanceof String)
        {  
            return sp.getString(key, (String) defaultObject);
        } else if (defaultObject instanceof Integer)
        {  
            return sp.getInt(key, (Integer) defaultObject);
        } else if (defaultObject instanceof Boolean)
        {  
            return sp.getBoolean(key, (Boolean) defaultObject);
        } else if (defaultObject instanceof Float)
        {  
            return sp.getFloat(key, (Float) defaultObject);
        } else if (defaultObject instanceof Long)
        {  
            return sp.getLong(key, (Long) defaultObject);
        }  
 
        return null;  
    }  
    /** 
     * 移除某个key值已经对应的值 
     * @param context 
     * @param key 
     */  
    public static void remove(Context context, String key)
    {  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.remove(key);  
        SharedPreferencesCompat.apply(editor);  
    }  
 
    /** 
     * 清除所有数据 
     * @param context 
     */  
    public static void clear(Context context)
    {  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.clear();  
        SharedPreferencesCompat.apply(editor);  
    }  
 
    /** 
     * 查询某个key是否已经存在 
     * @param context 
     * @param key 
     * @return 
     */  
    public static boolean contains(Context context, String key)
    {  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        return sp.contains(key);  
    }  
    /** 
     * 返回所有的键值对 
     *  
     * @param context 
     * @return 
     */  
    public static Map<String, ?> getAll(Context context)
    {  
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
                Context.MODE_PRIVATE);
        return sp.getAll();  
    }  
 
    /** 
     * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类 
     *  
     * @author zhy 
     *  
     */  
    private static class SharedPreferencesCompat  
    {  
        private static final Method sApplyMethod = findApplyMethod();
 
        /** 
         * 反射查找apply的方法 
         *  
         * @return 
         */  
        @SuppressWarnings({ "unchecked", "rawtypes" })
        private static Method findApplyMethod()
        {  
            try  
            {  
                Class clz = SharedPreferences.Editor.class;
                return clz.getMethod("apply");  
            } catch (NoSuchMethodException e)
            {  
            }  
 
            return null;  
        }  
        /** 
         * 如果找到则使用apply执行，否则使用commit 
         *  
         * @param editor 
         */  
        public static void apply(SharedPreferences.Editor editor)
        {  
            try  
            {  
                if (sApplyMethod != null)  
                {  
                    sApplyMethod.invoke(editor);  
                    return;  
                }  
            } catch (IllegalArgumentException e)
            {  
            } catch (IllegalAccessException e)
            {  
            } catch (InvocationTargetException e)
            {  
            }  
            editor.commit();  
        }  
    }  
 
}